| 石墨消解-原子吸收测定土壤中的锌和镉 |
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| 引用本文： | 张晓燕,王维,许惠英. 石墨消解-原子吸收测定土壤中的锌和镉[J]. 广州化工, 2014, 0(10): 167-168,174 |
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| 作者姓名： | 张晓燕 王维 许惠英 |
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| 作者单位： | [1]镇海环境监测站,浙江宁波315200 [2]浙江省河海测绘院,浙江杭州310008 [3]浙江树人大学生物与环境工程学院,浙江杭州310015 |
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| 摘 要： | 采用石墨消解的方法进行样品消解,并用原子吸收光谱法测定土壤中锌和镉的含量。实验结果表明:锌在石墨消解结合火焰原子吸收光谱法中锌浓度在1 mg/L以下成线性相关,相关系数R2=0.9995,该方法的最低检出限为0.02 mg/kg。而镉元素在小于10μg/L之间成指数函数相关,相关系数R2=0.99889,该方法的最低检出限为0.02 mg/kg。测定结果精密度、准确度令人满意。
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| 关 键 词： | 锌(Zn) 镉(Cd) 石墨消解 原子吸收 |
Graphite Digestion-Determination of Zn and Cd in Soil Samples by Atomic Absorption Spectrometry |
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| Affiliation: | ZHANG Xiao -yan , WANG Wei, XU Hui -ying ( 1 Zhenhai Environmental Monitoring Station, Zhejiang Ningbo 315200 ; 2 Zhejiang Surveying Institute of Estuary and Coast, Zhejiang Hangzhou 310008; 3 College of Biology ＆ Environment Engineering, Zhejiang Shuren University, Zhejiang Hangzhou 310015, China) |
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| Abstract: | Soil samples were digested by graphite and the content of Zn and Cd were determined by atomic absorption spectrophotometer. Experimental results showed that there was a good linear relationship at the concentration of 0 - 50 mg/L for zinc and a good unlinear relationship at the concentration of 0 - 50 μg/L for cadmium. The correlation coefficient of Zn was 0. 999 5 and that of cadmium was 0. 998 89. The detection limit was 0. 02 mg/kg for Zn and Cd. The determination results of precision and accuracy were satisfactory. |
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| Keywords: | Zn Cd hot block atomic absorption spectrum |
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